Collapsible core



B. DE MATTIA.

COLLAPSIBLE CORE.

A PPucATloN FILED :uns 8, 1920.

1,389,441. Patentemg. so, 1921.

F' 2 sHEETs-sHEET 1.

B. DE MATTIAc COLLAPSIBLE CORE. APPLICATION FILED IuNE 8, 1920.

LSBQAH. Patented Aug. 30, 1921.v Y n Y Y 2 SHEETS-SHEET 2.

I WTVSSES ATTORNEYS i Core for Use in the` Manufacture of UNITI-:D STATES PATENT OFFICE.

Application filed June 8,

To aZZ'wwm ztmayconcem: V

Be it known that I, BARTHOLD DE MATTIA, a citizen of the United States, and resident of Clifton, in the county of Passaic and State of New Jersey,-have-invented a new and useful Improvement in a Colla sible or Casings for Pneumatic Tires. l

The object of the present mventln 1s .to provide for a maximum freedom of movement of the movable parts or sections so 'as `to facilitate the withdrawal of the movable .parts or sections from the shoe or casin and thus facilitate .the removal. of the shog or casing without unnecessary distortion.

A further object 1s to provide a collapsible core in which the key section has such a movement with relation to the other sections that it can be removed from a position of operative continuity to a retracted position 1n such manner as to afford a greater clearance and freedom of movement of the adjacent movable sections.

A further object is to provide a key section for a collapsible core which, in its movement into and out of operative continuity, may be moved in the plane of the core, and also moved to position it in af plane at right angles to the plane of the core To the above ends the present invention consists of a collapsible core comprising a plurality of segmental sections including a key section, said key section being arranged so that it may be positioned in the plane of Vthe core and also in the plane at an angle to the fplane of the core, 1and it further consists o the devices and combinations of devices which will be hereinafter described and claimed.

The present invention is illustrated in the accompanying drawings in which- Figure 1 shows a top plan View showing in full lines the segmental sections in operative continuity, and in dotted lines, the key section partially retracted.

ig. 2 shows a -vertical Sectional view taken 0n the line 2-2 in Fig. 1.

' Fig. 3 is a top plan view illustrating the core in a collapsed condition, the key secl tion being shown in section.

Fig. 4 is a detail, parts being shown in section illustrating the key section in its retracted position and turned so as to eX- hoes -sired in theperation of Specification of Letters Patent. Patented Allg. 30, 1921.

1920. vserial No. 387,416.

-mental sections, there being four sections 1n the construction as illustrated, consisting of a iiXed section 1, a pivoted section 2, a swiveled section 3,- and a key section 4.

The 'fixed section 1 is ixedly secured as by means of the bolts 5 and 6 to the radial arms 7 and 8 projecting from a chuck 9. The chuck 9 is adjustably connected'as by means' of the bolts 10 and winged nuts 11, to the top of a table 12, the table 12 being pvotally or otherwise v supported as 'at 13 at the outer end of a jack arm 14, and upon its under side near its edge is provided with notches 15 arranged to be engaged by a latch 16 mounted in .the jack arm 14 whereby the table, chuck and core ma be turned as deuilding up a shoe or casing thereon.

The segmental section 2 is pi'votallyconnected at 17 to the radial arm 8 and the pivotal connection is preferably such that the section 2 not only has a movement inward and outward with relation to the center, but in itsinward and outward movements it will be depressed and elevated in an inclined direction from the pivot 17 tothe free end of the section 2, and thus more effectively cooperate with the other sections in securing a maximum' collapsing movement of the sections with the core.v

The section 3 is a relatively small section and is ivotally mounted at 18 to a swivel 19 which has a bearing in, and is arranged to turn in, alug 20 carried upon the inner surface of the fixed section 1, as clearly shown in Fig. 1 of the drawings. This construction permits the section 3 not only to have a swinging movement in and out about its pivot 18, but a swiveling movement about the axis of .the swivel so that when collapsed it will be dropped downwardly below the planeof the fixed section, as clearly shown in Fig." 3 of the drawings.

Coperating with these sections 1, 2 and 3 there is a key section 4 arranged to fit between and close lthe gap in the space between .the free ends of the sections 2 and 3, and

thus complete the operative continuity of the core, and the key section is arranged to have a sliding movement into and out of operative continuity, as indicated in dotted lines in Fig. 1.

referably the meeting faces of the key section 4 and the adjacent free ends of .the sections 2 and 3 will be cut or formed on slightly converging lines 21 and 22, that is to say, lines which converge from the inner to the outer surfaces so that the key section will have a wedge-like tit between the ends of the sections 2 and 3 and be free at all times to be retracted.

The key section 4 is provided upon its inner edge, preferably at the center thereof, with a stem or shank 23 preferably circular in cross section, and mounted to have a sliding movement in a bearing 24 in the chuck 9 and held therein by meansof a top plate 25 secured to the chuck 9 by means of nuts and bolts 26, the arrangement being such that the shank 23 may not only have a sliding movement initsbearing for of permitting the key section to`be advanced and retracted, but also may be turned in its bearing so that when the key section shall have been' retractedto the full extent permitted by the length of the shank 23 it may be turned so as to extend in a direction at right angles to the plane of the core, as indicated in Figs. 3 and 4 of the drawings.

The shank 23 is provided with a series of apertures 27 along its upper surface arranged. to be engaged by a pointed hook 28 pivotally connected as at 29 to a lever 30, the lever having at one end a handle 31 and at its opposite end a stud or pintle 32 arranged to be removably engaged with apertured ears 33, 34 and 35 carried by the chuck or the top plate 25, the arrangement being such that when the lever 30 is engaged with the ear 33, the pivoted hook 28 may be engaged with the apertures in the shank 23, for retracting in the shank and key section 4, and the lever 30 may be engaged with the ear 34 so that the pivoted hook 28 may be engaged with the apertured ear 36 on the pivoted section 2, for moving the said section inward, and it may also be engaged with the apertured ear 35 to that the pivoted hook 28 may engage the apertured ear 37 carried by the swiveled section 3 for retracting the said section.

Preferably the meeting faces of the sections Will be provided with some form of complementary interlocking devices as indicated at 38, 39, 40, 4l and 42 whereby to secure additional rigidity when the parts are .in operative continuity.

A setscrew 43 is tapped through a threaded bearing 1n the plate 25 in position to enthe purpose gage the shank 23 so as to lock the shank in its outward position to hold the key sec tion 4 firmly in place and to prevent the shank from turning in its bearing In operation, assuming that a shoe or casing has been built upin the usual manner on the core and itis desired to remove it therefrom, the operator first retracts the key section 4 until it clears the space between the sections 2 and 3, and is entirely removed from the shoe or casing. When itshall have been moved backward a sufficient distance lthe shank 23 is revolved in its bearing so that the key section 4 extends in a plane at right angles to the plane of the core, as indicated 1n Figs. 3 and 44' of the drawings after which the pivoted section 2 and the swiveled section 3 are swung inwardly and in the case of the swiveled section, downwardly, as indicated in Fig. 3, after which the shoe or casing may be stripped from the fixed section l.

Having describedmy invention, I claim: 1. A collapsible core comprising a plurality of segmental sections, including a key section, means for moving the key section into and out of operative continuity in the plane of therccre, and means for moving the key section when retracted about a radial axis so as to position it in a plane at right angles to the plane of the core.

2. A collapsible core comprising a plurality ofsegmental sections, including a key section, a shank or stem carrying said ke section, and a bearing in which the shan or stem has' a sliding and turningmovement.

3. A collapsible core comprising a plurality of segmental sections, including a key section, a shank or stem carrying said key lsection, a bearing supporting the shank or stem se that it has a sliding and turning movement therein, and means for locking the shank or stem in its bearing.

l4. A collapsible core comprisin a plurality of segmental sections, including a key section, a shank or stem circular in crosssection carrying said ,key section, a bearing inwhich said shank or stem has a sliding and turning movement, a series of apertures in said shank or stem, and means coperating with the apertures to retract the key section.

5. A collapsible core, comprising a fixed section, a pivoted section, a swiveled section and a key section, means to move the key section into and out of operative continuity in the plane of the core, and means to turn the key section at an angle to the plane of the core when retracted about a radial; axis.

BARTHOLD DE MATTIA. 

